fix(php-8.1): Ensure JsonSerializable implementation follows interface

.github/workflows/test.yml

@@ -13,7 +13,7 @@ jobs:
     strategy:
       fail-fast: true
       matrix:
-        php: [7.1, 7.2, 7.3, 7.4, 8.0]
+        php: [7.1, 7.2, 7.3, 7.4, 8.0, 8.1, 8.2]
 
     name: P${{ matrix.php }}
 
@@ -32,9 +32,10 @@ jobs:
         with:
           php-version: ${{ matrix.php }}
           coverage: none
+          ini-values: error_reporting=E_ALL
 
       - name: Install dependencies
-        run: composer install --prefer-dist --no-interaction --no-suggest
+        run: composer install --prefer-dist --no-interaction
 
       - name: Execute tests
         run: composer run-script test

phpunit.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0"?>
-<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" colors="true" bootstrap="vendor/autoload.php" xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.3/phpunit.xsd">
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" colors="true" bootstrap="vendor/autoload.php" xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.3/phpunit.xsd" convertDeprecationsToExceptions="true">
   <coverage>
     <include>
       <directory suffix=".php">./src/</directory>

src/Exceptions/ValidationException.php

@@ -16,7 +16,7 @@ class ValidationException extends Exception
      */
     protected $errors;
 
-    public function __construct($message = "", $code = 0, Throwable $previous = null, $errors)
+    public function __construct($message = "", $code = 0, Throwable $previous = null, $errors = null)
     {
         $this->errors = $errors;
         parent::__construct($message, $code, $previous);

src/Options.php

@@ -212,7 +212,7 @@ public function resolveConfig(Config $config)
      * Convert options to json
      * @return array
      */
-    public function jsonSerialize()
+    public function jsonSerialize(): mixed
     {
         return $this->toArray();
     }

src/Support/Response.php

@@ -17,7 +17,7 @@ class Response
      * Status of the
      * @var int
      */
-    protected $status = 422;
+    protected $status_code = 422;
 
     /**
      * Response data